Altisite (IMA symbol: Ati[1]) is an exceedingly rare alkaline titanium aluminosilicate chloride mineral with formula Na3K6Ti2Al2Si8O26Cl3, from alkaline pegmatites. It is named after its composition (ALuminium, TItanium, and SIlicon).[2][3][4]
| Altisite | |
|---|---|
| General | |
| Category | Mineral |
| Formula (repeating unit) | Na3K6Ti2Al2Si8O26Cl3 |
| IMA symbol | Ati |
| Identification | |
| Color | Colourless |
| Cleavage | None Observed |
| Fracture | Conchoidal |
| Mohs scale hardness | 6 |
| Luster | Vitreous |
| Streak | White |
| Specific gravity | 2.64 |
The mineral crystallizes in the monoclinic crystal system with space group C2/m.[2]
References
edit- ^ Warr, L.N. (2021). "IMA-CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
- ^ a b Ferraris G., Khomyakov A. P.,and Ivaldi G. 1995: Altisite Na3K6Ti2[Al2Si8O26]Cl3 a new hyperalkaline aluminosilicate from Kola Peninsula (Russia) related to lemoynite: Crystal structure and thermal evolution. Eur. J. Mineral., 7, 537–546 in Jambor J. L., Pertsev N. N. i Roberts A. C. 1996: New mineral names. Am. Min., 81, 516-520, [1]
- ^ http://www.mindat.org/min-150.html Mindat
- ^ http://webmineral.com/data/Altisite.shtml Webmineral
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